very durable. its thickness is just right for bicycle frames. once the bamboo dries out, workers cut it. then they join it. next, they bind it several times. after the resin hardens, it has to be sanded. it's a painstaking process that involves six types of sandpaper. and finally, they apply waterproof finish. from the start to finish, the process takes three months. every step of the process is checked thoroughly. the workers measure the distance between the frame and the gears down to the millimeter. they make sure that the chain is properly aligned. finally, three years ago, the bamboo bike is ready for export.